In medicine, amyloidosis refers to a variety of conditions wherein amyloid proteins are abnormally deposited in organs or tissues and cause harm. A protein is described as being amyloid if, due to an alteration in its secondary structure, it takes on a particular aggregated insoluble form, similar to the beta-pleated sheet. Symptoms vary widely depending upon where in the body amyloid deposits accumulate. Amyloidosis may be inherited or acquired.

Read more about Amyloidosis:  Classification of Amyloid, Pathogenesis, Classification, Symptoms, Diagnosis, Alternative Classifications, Additional Images